Quite simply, the issue is "what do you consider a black belt to mean?"
In the case of the parents of the 6 year old -- and the school the girl attends -- it apparently means showing up consistently over a couple of years, and (I presume) participating in the material taught. The OP doesn't seem to believe that there was even any real testing of the material. In that sort of a case... the black belt is little more than a participation trophy.
In other cases, it's an advanced beginner, ready for the real instruction in a system -- or that you consistently & reliably beating the brown belts and some of the black belts in the school or otherwise have demonstrated attainment of a certain level of skill and depth of knowledge. A black belt may or may not be a teaching rank; in some cases, the two things are completely separate, and in others, first degree/level black belts aren't considered ready to teach on their own yet.
To me... it doesn't really matter. I know black belts who typify just about every approach to the belt. Mine simply is an outward recognition that the senior members of my association (especially the chief instructor at the time) felt that I had met the standards to become a full member, in skill, knowledge, maturity, and personality/persona. I don't expect it to carry special weight to someone from another system, nor does it automatically make me an expert on any sort of armed/unarmed combat!
In the case of the parents of the 6 year old -- and the school the girl attends -- it apparently means showing up consistently over a couple of years, and (I presume) participating in the material taught. The OP doesn't seem to believe that there was even any real testing of the material. In that sort of a case... the black belt is little more than a participation trophy.
In other cases, it's an advanced beginner, ready for the real instruction in a system -- or that you consistently & reliably beating the brown belts and some of the black belts in the school or otherwise have demonstrated attainment of a certain level of skill and depth of knowledge. A black belt may or may not be a teaching rank; in some cases, the two things are completely separate, and in others, first degree/level black belts aren't considered ready to teach on their own yet.
To me... it doesn't really matter. I know black belts who typify just about every approach to the belt. Mine simply is an outward recognition that the senior members of my association (especially the chief instructor at the time) felt that I had met the standards to become a full member, in skill, knowledge, maturity, and personality/persona. I don't expect it to carry special weight to someone from another system, nor does it automatically make me an expert on any sort of armed/unarmed combat!